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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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    <title>Document</title>
</head>
<body>
    <script>
        function Person(age,sex) {
            this.age = age;
            this.sex = sex;
        }
        Person.prototype.eat = function () {
            console.log('我爱吃榴莲');
        }
        var yq = new Person(20,'男');
        yq.__proto__.eat();
          
    </script>
</body>
</html>